Hi.
I'm a programmer from Russia with strong skills in C++. You can see the full list of my skills on my profile page. My offer is to use C++ and Qt library. C++ will provide the best performance compared to other programming languages. Use of Qt library will make the application portable. The user will be able to run it in Windows, Linux, macOS, Android and iOS. I can create fancy GUI for it and customize the application for your needs.
If you're interested, feel free to contact me.
All the best,
Sergey.